1. An instructor distributes a questionnaire to students asking them to estimate the number of hours they study each week and their current GPA. According to the data, the correlation between the two variables is +0.93. Can we use these data to show students that studying causes improved grades? 2. Paula conducted a correlational study using 100 pairs of scores and found that r = 0.10. This correlation is far less than she expected. Describe in your words what could have caused this small correlation.
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